Trolley rivet



TROLLEY RIVET Filed March 27, 1934 I IIT-1| T. J. BYRNES 2,038,824

Patented Apr. 28, 1936 PATENT oFFl-CE aoss' "TROLLEY RIVET yrneablalia, Nebr. Application March 27, 1934,seria1No. 717,643 geminis. (c1. 10s-15o) This invention relates to trolleys and more particularly has reference to a trolley adapted for use in a packing house forvthe 'suspension and conveyance of animals prior to, during, and subsequent to slaughter. Y Y

The trolleys heretofore employed have been open to certain serious objections. 'Ihese prior trolleys have in general comprised a yoke member provided with a rivet extending therethrough and upon which the Wheel was journalled. At the time of assembling the several elements, the rivet was heated, and after insertionthrough the yoke and wheel the free end was flattened in order to lock the rivet Within the yoke.v Such assembly required the services of a blacksmith andV was relatively complicated. Likewise,l when it was necessary to replace one of the elements, it was necessary to send the trolley to a blacksmith shop where the rivet had to .be vcut out of the yoke.

Furthermore, the serviceability of the ,prior pulleys was of relatively short duration. This resulted from poor lubrication but principally from the fact that the rivets were rotatable within the yoke, and the bearing thus provided was limited. Consequently there Was excessive wear Vat such bearingpoints.

Again, diiculties were experienced in the operation of theseY previous pulleys. Theywere particularly subject to misalignmentbetween the wheel and yoke, andnthis resulted from the wear which occurred at the bearing points as above mentioned. Also, the method of replacing worn parts contributed to such misalignment.

Under many conditions ofloperation theabove disadvantages, andY particularly urnjiisalignrnent, would not have been seriol/isY )Howeven vin Aa pulley for the suspensionI andv conveyancemof animals, these disadvantages are ymost bpronounced. y Obviously the center of gravity ofthe supported carcass is located well below therail, and slight irregularities in the' construction of the pulley seriously interferes with Ythe operations in the slaughtering room. 1\/Ii"salignment between the wheels and other elements wouldlresult in the binding and sticking f the wheels and the yokes. Furthermore, the trolleys ,wu'lcl slide at curves and on switches, and would fre/duently leave the tracks completely. I l

To overcome the above objections,- and others inherent in the prior art is' one of the' objects' of my invention.

Another object of my invention is to provide a trolley that may be readily assembled, disassembled, and repaired, as occasion demands.

Yet another object of my invention is to pro- Nvide 'a trolley in whichk binding or sticking of the wheelslin the Yyokesl is prevented.

AV still further 'object o f my'invention is to provide a trolley which satisfactorily operates over a 5 long period of time. y u y To accomplish the above, and other important objects, my invention in general comprises the parts and combinations to be hereinafter set forth and claimed, with Athe understanding that 10 the several necessary elements 'A `comprisingl my invention may be varied construction, proportions and arrangement, without departing from the Vspirit and scope of the appended claims.

To facilitate a comprehension of my invention 15 reference'is made to the accompanying drawing in which oneispeciflc embodiment fis depicted, it vbeingdistinctly understood, however, that various modifications Vmay, be made therein lv'vithout exceeding the spirit and vscope of my invention. 20

In the drawing, in which corresponding numerals refer to the saine parts- 1 j Figure 1 is a side elevational view of my invention; Y

n Figure 2 is a vertical sectional view along line 25 242 of Figure 1; n

Figure 3 is as'ectionalview along line 3 3 of Figure 2, looking in the direction of thearrows.;

VFigure 4 is a view along line r4-4"'o`f Figure 2 looking in the direction of the arrows; '30

' Figure 5 is ai detailview of a modified form of locking means. Y l

In Figure 1 I have shown a conventional form of `yoke I, which is bent ,to-form arm members 2 antrag At the lower end of the' yoke anouk 4 35 is provided to' 'engage a chain or other grappling 'means `for the carcass. v Y f Oppositely disposed in the arms 2 and 3 are roundholes" V5 and `I, respectively. 'Ihese two holes are'dapted to receive av rivetvmernber l', 40 and inasmuch as the rivet is preventedvfrom rotation the holes 5 and 6 are preferablydrilled to afford arelatively closefit with the rivet. n Y Thev rivet l is provi-ded with a head 8, and from the ilat'siirface of the head 8 thereextends along 45 the longitudinal axis of the rivet a lug 9 On the exposed face of arm' 2 and connected with the hole' 5, there are drilled a plurality of recesses II. 'I 'llie' recesses IVI arethesame' size as the lug 9 and are adapted to receive the lug '19 so that the 50 nat rac of tn@ hea-d s' may ne against the armz.

It will be' appreciated that the lug 9 and the recesses I I serve to prevent rotation of the rivet 1 within the yoke.

The free end of the rivet 1 is tapered as at I2, 55

and an annular channel I3 is provided adjacent the tapered section. The channel I3 is adapted to receive a suitable locking means, preferably a split washer I4, to prevent removal of the rivet from the yoke. Although not essential, I prefer that the outer wall of the channel I3 be sloped as shown in Figure 2.

It'will be appreciated that inasmuch as the rivet 1 is not rotated with respect to the yoke I, there is no journal surface between theY two members and consequently no opportunity for wear. The facility with which the rivet 1 is assembled in the yoke is believed to be readily apparent. The rivet 1 is merely inserted through the apertures and 6, and turned so that the lug 9 registers with one of the recesses II. Y When the head 8Vlies against the arm 2 the washer I4 is slipped over the free end of the rivet until it rests within channel I3.

The sloping character of the end I2 facilitates Ythe positioning of the washer Within thechannel, and likewise the sloping side of-channel 1 4 permits of the ready removal of the washer.V As a matter Yof. fact a slight tap on theV free endof the rivet suflices to remove the washer from the channel, and even if the wall'of the channel should be straight, in lieu of slanting, the washer may be easily removed by merely opening it by the use of ascrew driver, chisel, or some similar instrument. In any event, no complicated mechanical equipment is necessary, nor is it necessary to send the trolley to a blacksmith Shop. The entire assemblyv and disassemblyof the trolley unit may be/accomplished in the slaughtering rooms.

Although I have not found it necessary, I have shownin Figure 5 a Way of more positively securing the washer I4 upon the rivet. To accomplish this I merely insert a cotter, pin I5 through a suitable hole drilled inthe end of the rivet 1. Such a cotter pin serves to securely hold the Washer in the channel I3 but, as stated, I have not found such an additional element necessary. ,Y Y,

Y There is shown in Figures l and 2 the trolley wheel. 'I'his Wheel is made up of a rim portion I6 provided with an annular groove I1 in which the track'is adapted to t. The rim lpis joined to a hub I8 by means of a spider I9.` It will be observed that the hub I8 ispjournaled on the rivet 1 yin relatively close fit in order-to prevent any radial movement of rockingrwith respect tothe rivet. It will also be noted that the hub I8 is in lrelatively close fit With the arms 2 and 3 of the yoke in order to preventaxial movement of the wheel on the rivet 1.

In order to facilitate lubrication of the moving parts I have provided a lubricating duct 2I Vwhich extends from the head-8 to approximately the center of the-hub I8. f The duet 2l is in communication with a duct 22 which extends to the peripheryof the rivet to thereby; lubricate the Wheel upon its rotation aboutthe pivot.Y The ducts ZI and 22 are of a siz'e sufficient to aiford adequate lubrication, but not so large that the lubricant flows therethrough by gravity. Therefore, the` duct 22 need not 'necessarily extend .downwardly from the duct 2|. Y'

, It' will be appreciatedrthat by the provision of la plurality of Yrecesses Il, the rivet 1 may be rotated to a corresponding number of operative positions, and locked in the desired position. This results in increased life for the rivet. Inasmuch las the principal friction-between the rivet 1 and hub I8 occurs along the under side of the rivet, the rivet may be rotated from time to time in order to compensate for such wear.

The advantages of my invention are believed to be readily apparent from the foregoing. The facility with which it may be assembled and disassembledfor repair purposes constitutes a decided advance over the pulleys heretofore used. Only a fraction of time is required for such operations, and they can becarried out by any laborer, thus obviatng the necessity of sending the pulley to a blacksmith shop.

Furthermore, it will be noted that the only relatively moving areas are the interior of the hub .I8.and the corresponding section of the rivet 1. This yaffords a comparatively broad bear- VWheels in such devices were particularly subject to misalignment andi binding with the yoke. These objections are overcome in my device by preventing the rotation of the rivet 1. Y Inasmuch as there are only tWorelatively movable elements in my invention lubrication of the moving parts can be better accomplished. Furthermore the provision .of ducts 2l and 22 Yfacilitates the lubrication of the necessary parts.

While I have shown and described the preferred embodiment of my invention, I wish it to be understood that I do not conne myself to the Vprecise Vdetails of construction herein set forth, by way of illustration, as it is apparent that many changes and variations may be made therein, by those skilled in the art, Without departing from the spirit of thevinvention, or exceeding, the scope of the appended claims.

Iclaimz Y' .Y I Y 1. A trolley comprising a yoked member, a Wheel adapted to run on a track, a rivet provided witha flattened head and adapted to extend through both arms of the yoke to serve as a bearing for the wheel, a lug on the rivet adjacent the head, a.V plurality of recesses in the yoke adapted to receive the lug to prevent rotation of the rivet, an annular channel on the end of the rivet opposite the head, a Washer adapted to fit in the channeland maintained'therein by a cotter pin, and a lubricating vduct extending Vfro'm'one end of the rivet to the centerof the Wheel bearing. Y v

2. A trolley comprising a yoked member,'aligned apertures in the arms of the yoked member, a

wheel adapted to run on a track, a rivet provided Y with a flattened head and adapted to extend therein by a cotter pin,and a lubricating duetV extending from the flattened head portion of the rivet to the center of the wheel bearing.

THOMAS J. BYRNES. 

